CN109499083B

CN109499083B - High-efficiency vacuum evaporator

Info

Publication number: CN109499083B
Application number: CN201811458026.5A
Authority: CN
Inventors: 王金鹏; 王金志
Original assignee: Jilin Jinpeng Pharmaceutical Machinery Complete Equipment Co ltd
Current assignee: Jilin Jinpeng Pharmaceutical Machinery Complete Equipment Co ltd
Priority date: 2018-11-30
Filing date: 2018-11-30
Publication date: 2021-02-05
Anticipated expiration: 2038-11-30
Also published as: CN109499083A

Abstract

The invention relates to a high-efficiency vacuum evaporator, which comprises the following components in sequential connection: the device comprises a single-effect heating chamber, a single-effect evaporation chamber, a condenser and a liquid collecting tank. According to the high-efficiency vacuum evaporator disclosed by the invention, after liquid medicine enters the evaporation chamber, the liquid medicine uniformly flows out from the inner edge of the annular plate and uniformly flows down on the vertical inner wall of the lower chamber. In the process of flowing down the liquid medicine, the liquid medicine is fully exchanged, and the high-efficiency evaporation of the liquid medicine is realized. According to the high-efficiency vacuum evaporator, the width of the annular plate, namely the difference between the radiuses of the inner edge and the outer edge, is 10-40 cm, so that most of liquid medicine can flow circumferentially on the annular plate under the action of inertia when entering an evaporation chamber, and can uniformly flow out of the inner edge of the annular plate.

Description

High-efficiency vacuum evaporator

Technical Field

The invention relates to the technical field of vacuum evaporation, in particular to a high-efficiency vacuum evaporator.

Background

Vacuum evaporation is an evaporation operation carried out under vacuum. Vacuum evaporation is characterized by a reduced boiling point of the solution at low pressure and evaporation of a large amount of water with less steam, which has the following advantages: 1. can be used for treating heat-sensitive materials which are easy to decompose at high temperature, such as milk, fruit juice, honey, antibiotics, etc. 2. The heat transfer driving force can be increased, and the evaporation capacity of the evaporator in unit heat transfer area is improved. 3. Can utilize low-temperature heat source to reduce energy consumption.

Vacuum evaporation techniques are also utilized in current pharmaceutical machinery. The evaporator for pharmacy heats the liquid medicine by external steam under the vacuum condition, and then the liquid medicine enters the evaporation chamber from the heater through a centrifugal pump. The chemical liquid is evaporated while flowing down along the inner wall of the evaporation chamber.

In the existing evaporator, the liquid medicine starts to flow downwards along the inner wall quickly after entering the evaporation chamber, and the liquid medicine flows out from the bottom of the evaporation chamber without sufficient heat exchange, so that the evaporation efficiency of the liquid medicine is low.

Disclosure of Invention

The invention provides a high-efficiency vacuum evaporator, aiming at solving the technical problems in the prior art.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a high efficiency vacuum evaporator comprising in series: the device comprises a first-effect heating chamber, a first-effect evaporation chamber, a condenser and a liquid collecting tank;

one imitate the evaporating chamber from top to bottom and include in proper order: an upper chamber, a lower chamber, and a discharge tube; the lower part of the upper chamber and the upper part of the lower chamber are respectively cylindrical; the lower end of the upper chamber is connected with the outer edge of the annular plate, and the upper end of the lower chamber is connected with the inner edge of the annular plate; a feeding pipe is connected to the upper chamber at a position close to the lower end along the tangential direction of the cross section; the discharge pipe is connected with the one-effect heating chamber;

after entering the primary evaporation chamber from the feeding pipe, the liquid can flow along the ring plate, and flows out of the upper chamber from the inner edge of the ring plate to enter the lower chamber, and then flows down uniformly along the inner wall of the lower chamber.

In the above technical solution, the difference between the radii of the inner and outer edges of the ring plate is 10-40 cm.

In the technical scheme, the diameter of the lower end of the upper chamber of the single-effect evaporation chamber is 2-3 m.

In the technical scheme, the diameter of the upper end of the lower chamber of the single-effect evaporation chamber is 1.2-2.8 m.

In the technical scheme, a double-effect heating chamber and a double-effect evaporation chamber which are sequentially connected are further arranged between the first-effect evaporation chamber and the condenser, the feeding end of the double-effect heating chamber is connected with the discharging end of the first-effect evaporation chamber, and the discharging end of the double-effect evaporation chamber is connected with the feeding end of the condenser;

the structure of the two-effect evaporation chamber is the same as that of the one-effect evaporation chamber.

In the technical scheme, the working temperatures of the primary-effect evaporation chamber and the secondary-effect evaporation chamber are 40-80 ℃.

In the technical scheme, the materials of the primary-effect evaporation chamber and the secondary-effect evaporation chamber are all stainless steel materials.

The invention has the following beneficial effects:

according to the high-efficiency vacuum evaporator disclosed by the invention, after the liquid medicine enters the evaporation chamber, the liquid medicine uniformly flows out from the inner edge of the annular plate and uniformly flows down on the vertical barrel-shaped inner wall of the lower chamber. In the process of flowing down the liquid medicine, the liquid medicine is fully exchanged, and the high-efficiency evaporation of the liquid medicine is realized.

According to the high-efficiency vacuum evaporator, the width of the annular plate, namely the difference between the radiuses of the inner edge and the outer edge, is 10-40 cm, so that most of liquid medicine can flow on the annular plate in the circumferential direction under the action of inertia when entering an evaporation chamber, and can uniformly flow out of the inner edge of the annular plate.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural view of a high-efficiency vacuum evaporator according to the present invention.

FIG. 2 is a schematic sectional top view of the first-effect evaporation chamber of the high-efficiency vacuum evaporator shown in FIG. 1.

The reference numerals in the figures denote:

1-one effect heating chamber; 2-a one-effect evaporation chamber; 3-a two-effect heating chamber; 4-a double-effect evaporation chamber; 5-a condenser; 6-liquid collection tank;

21-upper chamber; 22-a lower chamber; 23-ring plate; 24-a feed pipe; 25-discharge pipe.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the high-efficiency vacuum evaporator of the present invention comprises: the device comprises a first-effect heating chamber 1, a first-effect evaporation chamber 2, a second-effect heating chamber 3, a second-effect evaporation chamber 4, a condenser 5 and a liquid collecting tank 6.

In the high-efficiency vacuum evaporator of the present invention, the first-effect evaporation chamber 2 sequentially comprises from top to bottom: an upper chamber 21, a lower chamber 22, and a discharge pipe 25. The lower portion of the upper chamber 21 and the upper portion of the lower chamber 22 are respectively cylindrical. The lower end of the upper chamber 21 is connected to the outer edge of the ring plate 23, and the upper end of the lower chamber 22 is connected to the inner edge of the ring plate 23. The diameter of the lower end of the upper chamber 21 of the single-effect evaporation chamber 2 is 2.5m, the diameter of the upper end of the lower chamber 22 is 2.1m, and the difference between the radii of the inner and outer edges of the annular plate 23 is 20 cm. The upper chamber 21 is connected with a feed pipe 24 along a tangential direction of a cross section at a position near the lower end; the discharge pipe 25 is connected to the single-effect heating chamber 1. The two-effect evaporation chamber 4 has the same structure as the one-effect evaporation chamber 2, and is not described in detail herein. The working temperatures of the primary evaporation chamber 2 and the secondary evaporation chamber 4 are 40-80 ℃, respectively, and the liquid medicine can be evaporated at any temperature within the temperature range of 40-80 ℃. The materials for preparing the first-effect evaporation chamber 2 and the second-effect evaporation chamber 4 are stainless steel materials.

When the high-efficiency vacuum evaporator of the invention is used for evaporating the extracting solution of the traditional Chinese medicine, the one-effect heating chamber 1 can heat the liquid medicine conveyed by the raw liquid pump and then convey the liquid medicine to the one-effect evaporation chamber 2 for evaporation treatment. The lower end of the one-effect evaporation chamber 2 is connected with the liquid medicine adding end of the one-effect heating chamber 1 so as to carry out circulating treatment. When the liquid level of the first-effect evaporation chamber 2 reaches the upper limit, the raw liquid pump stops working, and simultaneously the circulating pump at the lower end of the first-effect evaporation chamber 2 starts working to circulate the liquid medicine in the first-effect heating chamber 1 and the first-effect evaporation chamber 2 and inject the liquid medicine into the second-effect heating chamber 3. When the liquid level in the double-effect evaporation chamber 4 reaches the upper limit, the circulating pump at the bottom of the double-effect evaporation chamber 4 is started to circulate the liquid medicine in the double-effect heating chamber 3 and the double-effect evaporation chamber 4. The condenser 5 can collect the condensate and convey the condensate into the liquid collecting tank 6 by the centrifugal pump under the control of the liquid level sensor.

As shown in fig. 2, after the liquid medicine enters the single-effect evaporation chamber 2 from the feeding pipe 24 along a tangent line at a certain flow rate, most of the liquid medicine flows along the annular plate 23 under the action of inertia. As the flow speed of the liquid medicine is gradually reduced, the liquid medicine flows out of the upper chamber 21 from the inner edge of the ring plate 23, enters the lower chamber 22, uniformly flows down along the inner wall of the lower chamber 22, and finally flows out of the single-effect evaporation chamber 2 from the discharge pipe 25. In the process of flowing down of the liquid medicine, sufficient heat exchange is carried out, and efficient evaporation of the liquid medicine is realized.

In the above-mentioned specific embodiment, all of the devices such as the raw liquid pump, the circulating pump, the centrifugal pump, etc., the vacuum component, the water cooling component, etc. are not shown in fig. 1, and those skilled in the art can flexibly set the devices according to the basic principle of vacuum evaporation and as required, and are not described herein again.

In other embodiments, the diameter of the lower end of the upper chamber of the single-effect evaporation chamber may be other values within a range of 2 to 3m, and the diameter of the upper end of the lower chamber may be other values within a range of 1.2 to 2.8m, so long as the difference between the radii of the inner and outer edges of the ring plate is 10 to 40cm, or the difference between the radii of the inner and outer edges of the ring plate is 3.3 to 20% of the diameter of the lower end of the upper chamber, which will not be described herein again. The reason is that the width of the ring plate, namely the difference between the radiuses of the inner edge and the outer edge is 10-40 cm, so that most of the liquid medicine can flow on the ring plate in a circumferential mode under the action of inertia when entering the evaporation chamber, and the liquid medicine can uniformly flow out from the inner edge of the ring plate.

In other embodiments, only one-effect heating chamber and one-effect evaporation chamber may be provided, or one-effect, two-effect, three-effect or even more-effect heating chambers and evaporation chambers may be provided, and the number of the specific heating chambers and evaporation chambers may be flexibly set by those skilled in the art according to the requirements of the scale of the evaporation treatment.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides a high-efficient vacuum evaporator which characterized in that, including connecting gradually: an effective heating chamber (1), an effective evaporation chamber (2), a condenser (5) and a liquid collecting tank (6);

one imitate evaporating chamber (2) from top to bottom include in proper order: an upper chamber (21), a lower chamber (22), and a discharge pipe (25); the lower part of the upper chamber (21) and the upper part of the lower chamber (22) are respectively cylindrical; the lower end of the upper chamber (21) is connected with the outer edge of the annular plate (23), and the upper end of the lower chamber (22) is connected with the inner edge of the annular plate (23); the upper chamber (21) is connected with a feeding pipe (24) at a position close to the lower end along the tangential direction of the cross section; the discharge pipe (25) is connected with the single-effect heating chamber (1);

after entering the primary evaporation chamber (2) from the feeding pipe (24), the liquid can flow along the ring plate (23), and flows out of the upper chamber (21) from the inner edge of the ring plate (23) to enter the lower chamber (22), and then uniformly flows down along the inner wall of the lower chamber (22);

the difference between the radiuses of the inner edge and the outer edge of the annular plate (23) is 10-40 cm;

the diameter of the lower end of an upper chamber (21) of the primary evaporation chamber (2) is 2-3 m;

the diameter of the upper end of the lower chamber (22) of the primary evaporation chamber (2) is 1.2-2.8 m;

a secondary-effect heating chamber (3) and a secondary-effect evaporation chamber (4) which are sequentially connected are further arranged between the primary-effect evaporation chamber (2) and the condenser (5), the feeding end of the secondary-effect heating chamber (3) is connected with the discharging end of the primary-effect evaporation chamber (2), and the discharging end of the secondary-effect evaporation chamber (4) is connected with the feeding end of the condenser (5);

the structure of the two-effect evaporation chamber (4) is the same as that of the one-effect evaporation chamber (2).

2. The high-efficiency vacuum evaporator according to claim 1, characterized in that the working temperatures of the primary evaporation chamber (2) and the secondary evaporation chamber (4) are 40-80 ℃ respectively.

3. The high-efficiency vacuum evaporator according to claim 1, characterized in that the materials of the primary evaporation chamber (2) and the secondary evaporation chamber (4) are stainless steel materials.